Bohrium (Bh) — Element 107: Properties & Data | Aladdin Scientific

Bohrium(Bh) — Element 107

Transition metal · Group 7 · Period 7

Bohrium (Bh) is a transition metal with atomic number 107 and atomic mass 270.133. It sits in group 7 and period 7 of the periodic table and was discovered in 1976.

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Key facts

Atomic mass	270.1330 u
Electron configuration	[Rn]7s2 5f14 6d5
Oxidation states	7, 5, 4, 3
Standard state	Solid
Year discovered	1976

Preguntas frecuentes

What is the electron configuration of bohrium?

The ground-state electron configuration of bohrium is [Rn]7s2 5f14 6d5.

What group and period is bohrium in?

Bohrium (Bh) is in group 7 and period 7 of the periodic table, classified as a transition metal.

What is the standard state of bohrium?

Bohrium is a solid at standard temperature and pressure.

When was bohrium discovered?

Bohrium was discovered in 1976.

Sobre estos datos: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: July 15, 2026.